Slipper sole



FIG. 1 is a top perspective view of a slipper sole showing my new design;

FIG. 2 is a bottom perspective view;

FIG. 3 is a top plan view;

FIG. 4 is a bottom plan view;

FIG. 5 is a front view;

FIG. 6 is a rear view;

FIG. 7 is a right side elevational view; and,

FIG. 8 is a left side elevational view. 

The ornamental design for slipper sole, as shown and described. 